Emits UVB a full 20″/51cm from the surface of the lamp to prevent or reverse Metabolic Bone Disease. (Compared to 12″/30cm on the ReptiSun® 5.0). Optimal for use with larger terrariums where greater than 12″ of UVB penetration is needed. The ReptiSun® 10.0 is also recommended for use above screen covers which can filter out up to 50% of the UVB wavelengths.   10% UVB 30% UVA High quality bulbs made in Germany. CHOOSE THE CORRECT UVB GLOBE> UVB REPORT> RETHINKING REPTILE LIGHTING>